Condenser



Patented Feb. 25,. 1930 UNITED STATES mar PATENT oFFIcE ERNEST A.BOHLMAN, ORCHICAGO, ILLINOIS, ASSIGNOR TO KELLOGG SWITCHBOARD AND SUPPLYCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS CONDENSERapplication filed May 28,

shown in general use in wireless sets; and an i gether and also the saidplates soldered to said a object of my invention is'the provisionof animproved condenser of the variable type, which is provided withstructural features in combination with novel assembly features, whichcombination produces an improved condenser of the above type which iseff cient in its'operation and inexpensive to manufacture.

An object ofmy invention is the provision of simple means for properlyspacing and supporting theplates of the stator element and of the rotorelement of my condenser; and also the provision of means for supportingand f operatively associating the stator and rotor elements of mycondenser.

Another feature of my invention is the provision of means in the platesof the stator and rotor elements for permitting their support ing andspacing means to be soldered tosupporting and spacing means.

Still another feature of my invention is the provision of an end thrustbearing for the shaft of the rotor element of my invention which endthrust bearing is provided with a ball bearing for engaging an arcuateshaped opening in the end of said shaft to permit easy rotation of saidshaft.

The above features, as well as others, will be more specifically pointedout in the ensuing specification and appended claims, and for a clearerunderstanding of the same reference may be had to the accompanyingdrawings in which like, reference characters in the several views denotelike parts.

Referring to the drawings,

Fig. 1 is a view in elevation of the condenser of my invention;

Fig. 2. is a plan view of the condenser of my invention; a

Fig. 3 is a right side view of Fig. 2 looking to the left;

Fig. 4 is a plan view along the line 4% of Fig. 1;

Fig. 5 is a sectional view of a pair of the supporting and spacingmembers of my'in- 1924. Serial No. 716,342.

vention showing the same in position for re ceiving the integrallyformed members of the plates shown in the right of this figure;

Fig. 6 is a view similar to Fig. 5 but showing the integrally formedmembers of the plates engaging the pair of supporting and spacingmembers in assembled position;

Fig. 7 is a perspective view of a pair of the supporting and spacingmembers for the condenser plates of my condenser; and

Fig. 8 is a partial perspective view of one of the plates of the rotorelement of my invention showing the'integrally formed ears or membersfor engaging the pairs of supporting and spacing members of mycondenser.

Referring now in detail to my invention as illustrated in the drawings Iwill first describe the construction of the supporting and spacing meansof my invention and the manner in which I utilize the same forsupporting and spacing the plates of the rotor element and the plates ofthe stator element of the condenser of my invention.

' Referring to my spacing means P, the same comprises a pair of oblongrectangular members 1 and 2, each of which is provided with a pluralityof rectangular openings or windows 3 and 4 respectively. The size of theopenings 3 and 4 are substantially the same, and the portion 3 and theportion 4 between the openings 3 and 4 respectively, are slightlysmaller in width than the width of the said openings 3 and 4respectively so that when the members 1 and 2 are placed together asshown in Fig. 5 the said portions 3 will come opposite the openings 4.and the portions 4 will come opposite the openings 3 but not so as tocompletely close the said openings 3 and 4.

Referring to the rotor element R of my invention, it comprises aplurality of semi-circular plates 5, suitably formed of aluminum, eachof which is provided with .a reduced semi-circular portion 6, in whichis provided a suitable opening 7 for receiving the rotatable shaft 8.Ears or lugs 9 are integrally formed on the periphery of the saidreduced semi-circular portion 6 of the plate 5 and extend in the sameplane as the said plate. Concave grooves 12 are provided in the ears 9for purposes to be pointed out lateri" In assembling the rotor elementR, the pair 'of -memb e'rs 1' and 2 are placed together as shown in Fig.5, (there bein a pair of these member-s11 and 2 provided or each ear 9of the plate 5,) and an ear 9 of the plate 5 is inserted into thealigned opening 10 provided by the aligned endportions of the openings 3and 4 of said members 1 and 2 as shown in Fig; 6, the ear 9. protrudingthrough and rest-' .ing between the-portions 3' and 4' of said members 1and 2. When allot the plates 5 of the rotor element R have their ears 9en-.

- the rotor element R. A thin strip of solder is now placed in thealigned grooves 12, formed in the ears 9 of the plates 5 and a solderingiron applied thereto whereupon said solder will engage the members 1 and2 and also the ears 9 of the plates 5 to secure the members 1 and 2together and the ears 9 of the plates 5 in their assembled position inthe pairs of members 1 and 2. By having the grooves 12 provided in theem 9 and in vertical alignment with each other whenthe plates 5 areassembled, a thin strip of solder may be laid in the aligned grooves 12and a hot soldering iron run over said strip of solder by one movementof the hand thereby saving time, and the grooves 12 also act as guidingmeans or as a chute for guiding the melted solder between the ears 9 andthe members 1 and 2 thereby avoiding'the smearing of solder all over theplates 5. A disk 37 is provided which is adapted to engage thetop plate5and to also engage the extending ends of the members 1 of the spacingmeans P, whereupon solder is applied to secure the said disk 37 to thesaid extending ends of said members 1. The disk 37 has a hub member 36integrally formed therewith which is provided with a central opening inalignment with an opening in said disk 37 for purposes which will be setforth in the ensuing specification. After the above described assemblagehas beenvperformed a single rotor element unit R is efiected as will beclearly understood from the foregoing description.

Referring now to the stator or stationary element S of my condenser thesame comprises a plurality of semi-circularly shaped plates 15 formed ofaluminum and are provided with integrally formed ears 16. The plates 15are assembled, secured, and supported as well as spaced by pairs ofspacing.

members 1 and 2 in substantially the same manner as plates 5 of therotor element R are supported and spaced by the pairs of mem bers 1 and2as described above and a detail description of the same is not thoughtneces sary.- Each plate 15 has a portion of its body cut away to form anarcuate opening 17 for receiving the semi-circular portion 6 tion of theplate 5 within the open space provided by a pair of the plates 15. Thememspacing members 1 and 2 are heavier in weight than the member 2' andare also long enough to have their ends turned over at right anglesforpurposes to be pointed out later.

the stator element S in operative position relative to each other, apair of supporting members 20 and21 are provided which are securedtogether and separated from each other by bridge members 23, which havetheir ends turned over and provided with suitable openof a plate 5 andis of a size to permit the rota- For supporting the rotor element R and7 her 1 of two pairs of the supporting and ings for receiving the screws24;, said screws extending through suitable openings in the bridgemembers23 and insulating strips 26 and have screw-threaded engagementwith the nuts 25; The supporting member 21 is provided with members 28integrally formed therewith for mounting purposes.

In mounting the stator element S of my condenser the same is insertedbetween the supporting members 20 and 21 so that the turned over ends ofthe member 1' of the spacin g members .will engage the insulating strips26, and to secure the stator element S betwen the supporting members 20and 21, screws 32 and 33 are provided which extend through suitableopenings in the insulatingstrips 26 and then have screw-threadedengagement with suitably tapped orifices in the turned over ends of thespacing members 1. The heads of the screws 32 and 33 occupy openings inthe members 20 and 21 respectively, but do not'have contactualengagement with said members 20 and 21 to prevent the stator element Sfrom being connected .in circuit with the rotor element R. Thus it willbe seen that the stator element S is secured. and supported between themounting members 20 and 21 by a pair of-the spacing members 1 and areinsulated therefrom by the insulating strips 26 and the said pair ofmembers 1 are heavier in weight compared with the members 2 since theyserve to support the stator element S.

Therotor element R is now inserted be tween the members 20 and 21, andthe plates 5 are inserted between the plates 15 of the stator element S,so that a portion of the coneshaped end 35 of the hub 36 engages theconvex end of the adjustable tubular screw 38, which screw extendsthrough and has screwthreaded engagement with a lock nut 39 and asuitably tapped orifice in the member 21. The nut lock 39 serves to lockthe adjustable screw 38 in its adjusted position. The shaft 8 is nowinserted through the adjustable tubugnaw-4 Iar screw 38 and through thecentral opening provided in the hub 36 and member 37, and then throughthe aligned openings 7 in the plates 5 of the rotor element It. One end8' of the shaft8 extends slightly into an open ing 20' in the member 20and-is provided with a semi-circular recess 40 which is adapted toreceive a ball bearing 41, the said ball bearing being held in the saidrecess 40 in engagement with the end of the shaft 8 and in the opening20 by a spring member 42, which spring member 42 has its one end securedto the member 20 by a screw 43, and its other end shaped to form aconvex recess for receiving the ball bearing 41. Due to the springeffectof the spring member 42 the ball bearing 41 is maintained in the recess40 formed in the end of the shaft 8. The shaft 8 will tend to be movedupward due to the spring pressure exerted by the spring member 42, sothat the cone-shaped end 35 of the hub 36 is forced upwardly andmaintained in engagement with the convex opening of the tubular screw38, the hub 36 being secured on the shaft against movement thereon bythe set screw 45. To adjust the plates 5 of the rotor element R relativeto the plates 15 of the stator element S all that is necessary is toloosen the lock nut 39 and rotate the adjustable tubular screw 38 in aclockwise or counter clockwise direction depending on the desiredadjustment, which will move the hub 36 and shaft 8 downwardly, if thesaid screw 38 is rotated in a clockwise direction, or to permitthe saidhub 36 and shaft 8 to be moved upwardly by the spring member 42 incasethe saidscrew 38 is rotated in a counter clockwise direction. henthe desired adjustment of the plates 5 relative to the plates 15 isobtained the lock nut 39 is screwed down against the member 21 to holdthe screw 38 in its adjusted position. Thus it will be readily apparentthat I provide simple means for adj usting tlre plates of the rotorelement R relative to the plates of the stator element S.

The rotor element B- may be rotated by rotating theshaft 8 to positionthe plates 5 relative to the plates 15of the stator element S for thewell known purposes. When the shaft 8 is rotated the ball bearing 41permits easy rotation of the said shaft 8, and when the rotor element Ris adjusted in a rotary direction relative to the stator element S, therotor element R is held in its adjusted position due to the frictionalengagement of the coneshaped end 35, of the hub 36, and the walls of theconvex opening in the tubular screw 38, the spring member 42 maintainingthe end 35 of said hub 36 in frictional engagement with the tubularscrew 38. The shaft 8 of my condenser may be suitably adjusted byloosening the set screw 45. 3

My condenser may be mounted on a suitable panel or mounting member bysuitable screws which may extend through suitable openings in said panelor mounting member and then have screw-threaded engagement with suitablytapped orificesin the members 28 formed integrally with the plate 21,the said members 28 abutting against the said panel or mounting member.

A screw 46 passes through a suitable orifice in the spring member 42 andhas screw threaded engagement with a suitable tapped orifice in theplate 20. The screw 46 serves as an adjusting screw for placing theproper tension upon the free end of the spring 42 which bears againstthe bearing 41 in the end 8 of the shaft 8 so that the rotor element Rwill be maintained in any of its adjusted positions.

IVhile I have described and illustrated a preferred embodiment of myinvention it is to be understood that I do not wish to be limited to theexact structure, as shown and described. but that I intend to cover allthat may come within the spirit and scope of the appended claims.

Having described my invention what I claim as new and desire to secureby United States Letters Patent is:

1. A device of the class described including a plurality of plates, apair of members having openings placed together so that the openings ofsaid members are in Zigzag rela tion relative to each other, said platesdivided into pairs so that a pair of said' plates will extend throughthe same opening in one of said members and through different openingsin the other of said members whereby said members support and separatesaid plates.

A device of the class described includmembers. a mounting frame. meansfor supporting said. stationary element in said frame.

adjustable means secured in said frame. a

tional engagement with said adjustable 3. A device of the classdescribed including a rotor element, a plurality of plates comprisingsaid rotor element. means for securing said plates together in spacedrelation to prevent said plates moving relative to each other, amounting frame. adjustable means secured in said frame adapted tomaintain said rotor element in any of its adjusted positions, said framehaving an opening, a ball bearing spring supported therein, a shaftextending through said adjustable means and said rotor element and intothe opening in said frame, said ball bearing adapted to engage the endof said shaft, and means com:

prising a disk secured to said rotor element having a hub portionadapted to be operatively connected to said shaft and said adjustablemaintaining means for securing said rotor element and shaft togetheragainst rotary movement relative to each other.

4. A device of the class described including a mounting frame, a fixedelement secured in said mounting frame, a movable element, a pluralityof plates comprising said movable element, means for securing saidplates together in a spaced relation to prevcntsaid plates movingrelative to'each other, a disk, having a cylindrical member integrallyformed therewith, for said movable element, adjustable means secured inone side ofsaid frame. said frame having an opening in the other sidethereof, a shaft extending through said adjustable'means, saidcylindrical member and disk, and through said movable element and intosaid opening in said frame. and a ball bearing for engaging the end ofsaid shaft in said opening, said cylindrical member having frictionalengagen'ient with said adjustable means for holding said mov ableelement in any of its movable positions, and means for said cylindricalmember for securing said movable element on said shaft against rotarymovement relative to said shaft.

5. "A device of the class described including conducting plates, earsformed with said plates, said ears having grooves formed therein,members, provided with openings, arranged in pairs so that said openingsare in zigzag relation relative to each other, the

' ears of said plates adapted to engage said xi openings whereby saidplates are supported and separated by said members to form an airdielectric between said plates, said grooves adapted to receive solderand to guide the same to said pairs of members and said ears wherebysaid plates and said pairs of members are soldered together to form asingleunit.

6. A device of the character described ineluding a plurality of membersadapted to be secured together in spaced relation, a pair of strips.provided with openings and adapted to cooperate with each other wherebya pair of said members extends through the same opening in one of saidstrips and different openings in the other one of said strips so thatone strip operates to prevent two of said members from separating whilethe other stri revents said members from contactin 7. A device of thecharacter described including a pair of members adapted to be held inspaced relation, a supporting element pro vided with openings andcooperating with said membersto prevent separation of, said members, anda second supporting element provided with openings for holding saidmembers in spaced relation, said pair of members adapted to extendthrough the same opening in said first element and through adjacentopenings in said second supportng-element, said elements lying adjacenteach other and secured together.

8. A device of the character described. including a plurality of membersadapted to be heldin spaced relation, a supporting ele- -mentprovidedwith openings and adapted Icluding a plurality of plates each providedwith extended portions, a pair of fiat supports cooperating to hold saidplates in spaced relation, each of said supports having notches forreceiving extended portions of said plates, said notches beingsubstantially equal to the spacing between said plates plus thethickness of two of said plates.

10. A device of the character described including a pair of plates eachprovided with an integrally formed ear,'a fiat support having arectangular notch for receiving said ears to hold said plates in spacedrelation, said notch being substantially equal to the spacing betweenthe plates plus the thickness of said plates.

Signed by me at Chicago, in the county of Cook and State of Illinois,this 26th day of May, 1924.

ERNEST A. BOHLMAN.

